Keyword 2000 Data Line
WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
The Keyword protocols utilizes a single wire bi-directional data line between the modules and the scan tool. The message structure is a request and response arrangement. Keyword 2000 is used for scan tool diagnostics only. The modules do not exchange data on these systems.
The modules on the Keyword 2000 data line are:
- Electronic brake control module (EBCM)
- Engine control module (ECM)
- Transaxle control module (TCM)